Electrosynthesis of PANI@MgO/TiO2 Nanocomposite film by Cyclic voltammetry method and investigation of its ability to remove of heavy metals ion from aquatic media

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Varshosaz Behrokh; SAMADI SUSAN; Mazlumifar Ali

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Journal: NANOSCALE Year:2019 | Volume:6 | Issue:3 Page(s): 61-72

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Title

Electrosynthesis of PANI@MgO/TiO2 Nanocomposite film by Cyclic voltammetry method and investigation of its ability to remove of heavy metals ion from aquatic media

Author(s)

Varshosaz Behrokh | SAMADI SUSAN | Mazlumifar Ali | Issue Writer Certificate

Keywords

NanocompositeQ1

RemovalQ1

Lead (II)Q1

Magnesium oxideQ1

PolyanilineQ1

TitaniaQ2

Abstract

In this paper, preparing process of the PANI@MgO/TiO2 Nanocomposite film and its application as a lead (II) ion adsorbent from aqueous solutions is reported. The MgO/TiO2 Nanocomposite was synthesized by sol-gel method. In order to prevent the dispersion of synthesized Nanocomposite in the environment, the PANI @MgO/TiO2 Nanocomposite film was prepared using a cyclic voltammetry in a phosphoric acid and potassium chloride medium at a concentration of 0. 5 M as a carrier electrolyte on a graphite electrode in the potential range of-0. 2 to 1 volt. Various methods were used to identify the microstructure of resulting film. The XRD pattern confirmed the presence of Magnesium oxide and crystallized titanium dioxide in the Nanocomposite. The FESEM image showed that the Nanocomposite was formed in a uniform spherical form with an average diameter of 61nm. The EDX analysis confirmed the presence of magnesium, titanium and oxygen elements. The FT-IR spectra showed the expected fine structure. The prepared Nanocomposite film was used to remove lead (II) ion from aqueous solution and the factors affecting Removal were optimized. Temperature of 25° C, 15 min contact time, pH range of 4 to 5, and nano-adsorbent amount 0. 066g were obtained as optimal conditions for Removal of Pb 2+ ion. In these conditions, the sorption capacity was 48. 5 mg/gsorbent. Also, the study revealed that the presence of interference ions doesn’ t affect on Removal process and the ability of nano-adsorbent in the samples with complex matrix is significant. The study of nano-sorption isotherms showed that the equilibrium results are consistent with the Langmuir and Freundlich equations.

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